I am using an on premise exchange server (but the same behavior is with O365).
Exchange 2 domains: domain1.com and domain2.com and setup in Sophos Central with inbound and outbound mail flow through central email and ADSync for users/mailboxes.
2 mailboxes setup with:
Mailbox1: SMTP:firstname.lastname@example.org, smtp:email@example.com, smtp:firstname.lastname@example.org
Mailbox2: SMTP:email@example.com, smtp:firstname.lastname@example.org, smtp:email@example.com
Behavior (email sent to external recipient through Sophos central):
Sent from SMTP:firstname.lastname@example.org – OK
Sent from smtp:email@example.com – OK
Sent from smtp:firstname.lastname@example.org – rejected by Sophos Central
Sent from SMTP:email@example.com – OK
Sent from smtp:firstname.lastname@example.org – rejected by Sophos Central
Sent from smtp:email@example.com – OK
If I send an email from an alias address which has a different domain then the primary address then Sophos Central is rejecting the email and not delivering it to the final recipient even both domains are set up in Sophos Central.
I have a support case (05321938) open since 06/2022 about this problem, but no solution has been found.
Has anyone run into the same problem and found a solution for it?
Thanks’ with kind regards.
[edited by: Raphael Alganes at 11:05 AM (GMT -7) on 2 Jun 2023]